Urethane elastomers with improved color stability

a technology of urethane elastomers and color stability, which is applied in the field of golf balls, can solve the problems of lack of durability required by recreational golfers, easy damage, and balata-covered balls, and achieve the effects of reducing or preventing the rapid degradation of color, and uv absorption and/or blocking qualities

Inactive Publication Date: 2004-01-29
ACUSHNET CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

0062] Thus, it is also preferred that the polyurethane composition of the present invention include at least one color stabilizer. Color stabilizers include, but are not limited to, UV absorbers, radical scavengers, such as hindered amine light stabilizers ("HALS"), thermal stabilizers and antioxidants, quenchers, such as nickel quenchers, hydroperoxide decomposers, fillers, and mixtures thereof. It has been determined that fillers, such as ZnO and TiO2, pigments, and paints, have some UV absorbing and/or blocking qualities, and as such, can contribute to the color stability of the polyurethane comp...

Problems solved by technology

Balata-covered balls, however, are easily damaged, and th...

Method used

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  • Urethane elastomers with improved color stability
  • Urethane elastomers with improved color stability
  • Urethane elastomers with improved color stability

Examples

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example 1

[0162] Comparison of Conventional Polyurethane Golf Ball Covers Versus a Polyurethane Cover Produced According to the Invention.

[0163] Two identically-constructed golf balls were prepared, each including a liquid-filled center, a wound layer, and a polyurethane cover. The first golf ball (Formulation I"), prepared according to the invention, has a cover layer formed of the polyurethane composition of the present invention including a reaction product of 4,4'-diphenylmethane diisocyanate ("MDI"), polytetramethylene ether glycol ("PTMEG"), a mixture of 3,5-dimethylthio-2,4-toluenediamine and 3,5-dimethylthio-2,6-toluenediamine curatives (Ethacure 300), and UV stabilizers TINUVIN 571 and TINUVIN 765. The second golf ball ("Formulation II") has a cover layer formed of a polyurethane composition including a reaction product of 4,4'-diphenylmethane diisocyanate ("MDI"), polytetramethylene ether glycol ("PTMEG"), a mixture of 3,5-dimethylthio-2,4-toluenediamine and 3,5-dimethylthio-2,6-tol...

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Abstract

A golf ball including a center, a cover, and, optionally, at least one intermediate layer disposed between the center and the cover, wherein the cover is formed from a polyurethane composition, or a reaction product thereof, including at least one polyol; at least one polyisocyanate; at least one curing agent; and at least one color stabilizer; wherein the color stabilizer is present in an amount sufficient to provide a DeltaC* of less than about 22 upon exposure to UV light over a timeframe of 1 hour.

Description

CROSS-REFERENCE INVENTION[0001] This application is a continuation of U.S. patent application Ser. No. 09 / 861,908, filed May 21, 2001, now pending, the entire disclosure of which is incorporated by reference herein.[0002] The invention relates generally to golf balls and, in one embodiment, to golf ball covers formed of a polyurethane composition. The polyurethane composition of the invention includes a pre-polymer, a curing agent, and a UV stabilizer package for improved color stability.[0003] Golf balls, whether of solid or wound construction, generally include a core and a cover. It is known in the art to modify the properties of a conventional solid ball by altering the typical single layer core and single cover layer construction to provide a ball having at least one mantle layer disposed between the cover and the core. The core may be solid or liquid-filled, and may be formed of a single layer or one or more layers. Covers, in addition to cores, may also be formed of one or mo...

Claims

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Application Information

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IPC IPC(8): A63B37/00A63B37/12A63B45/00C08G18/10C08G18/48C08K5/00C08K5/3435C08L75/04
CPCA63B37/0003A63B37/0021A63B37/0031A63B37/0034A63B37/0037A63B37/12A63B43/06C08L21/00A63B2209/00C08G18/10C08G18/4854C08K5/34C08G18/3868
Inventor BULPETT, DAVID A.WU, SHENSHENHARRIS, KEVIN M.KUNTIMADDI, MANJARILUTZ, MITCHELL E.
Owner ACUSHNET CO
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